The second great awakening and the abolition movement have in common:
B. Both relied on religious belief
The Second Great Awakenings was backed by the Protestant denomination while Abolition was often backed by the Quaker denomination.
They met new people, shared ideas, and learned new skills.
I don't know that's a good question
Advantages: If your community was growing that's amazing. What ERA? All I can say that if your community is growing you'll have more people in it and your community will be more productive. Farming, Trades, Money, that helps a community out a lot. Also jobs, having jobs like blacksmiths or farmers help economically
Disadvantages: Increasing of global human population is also depleting natural resources like water, food, and land.